PRUFROCK PRESS INC. is graciously donating THREE copies of their Math Dictionary for Kids: (Grades 4-9) to be given away to my blog readers! (Only U.S. and Canada addresses, please.) This dictionary has been recently updated and is now in full color! Go check how it looks like inside At Amazon: If you want to take part in the giveaway, leave a comment here, AND email me so I'll have your email address to contact you if you win. I will run this until August 21 OR until I get 100 entries, whichever happens first. And it's only for U.S. and Canada addresses. COMMENTS ARE CLOSED NOW... I GOT MORE THAN 100 in record time. The WINNERS are RJC, Sheri R, and mommygirl @ HCA. THANKS EVERYONE! AND, not only that, but Denise also has a math book giveaway at her blog... hers are for TWO books: Keith Devlin’s new e-book, Leonardo and Steve: The Young Genius Who Beat Apple to Market by 800 Years, and his latest print book, The Man of Numbers: Fibonacci’s Arithmetic Revolu...
(Updated in 2018) People sometimes ask me of my opinion or review of Saxon math. What I've written here applies in particular to Saxon Math's high school courses and middle grade levels. (The grades K-3 are by a different author and are quite different; more on that below.) Saxon Math uses an "incremental approach" where math concepts are studied in little pieces over several lessons, and those lessons are strawed over a long period of time, intermixed with lessons about other topics. In other words, if one lesson is on some particular topic (say, percentages or inequalities), it's almost guaranteed that the NEXT lesson is NOT on that topic . It jumps around from topic to topic constantly, and this is by design. Saxon's method also includes a feature where after a lesson is taught, there are very few practice problems about the topic of the lesson. Most of the problems are mixed review problems, and they practice concepts from earlier lessons, not th...
Recently this was highlighted at Slashdot and Digg.com both. A math professor James Anderson has made a new 'number' or entity that he calls NULLITY, in order to solve problems such as 0/0, which traditionally is left undefined. Basically he first defined 1/0 as infinity, -1/0 as negative infinity, and 0/0 as nullity, using Φ (Phi) as a symbol for it. He said this nullity lies outside our normal number line, not on it. I watched the video shown on BBC news , and there he went on to show what happens with the "age-old" problem of 0 0 , (zero to zeroth power) using just normal rules of arithmetic plus these definitions: 0 0 = 0 (1 − 1) = 0 1 × 0 -1 =(0/1) 1 × (0/1) -1 Now, for every number, the 1st power is the number itself, while the -1 power is its reciprocal: = (0/1) × (1/0) = (0 × 1) / (1 × 0 ) = 0/0 = Nullity. Anderson said in the comments following the main article on BBC that two other professors have helped him develop axioms for this...
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I will add this to my site.